Step 2:Cut the zest off half an orange with a sharp paring knife or vegetable peeler so that only the orange part is removed. If some of the bitter white pith is still attached to the zest, cut it off and discard it。
第二步:从橙子上剥下橙皮,注意只要橘色的橙皮,不要带苦味的白色部分。